How it started
The Tokio Marine and Fire Insurance
The antecedent Tokyo Marine insurance is the first insurance company (as the marine insurance company) in Japan, and also the top sales damage insurance company of Japan in pre-war era.
August 1879 - Tokyo Marine Insurance (東京海上保険) established.
January 1891 - Meiji Fire Insurance (明治火災保険) established.
April 1918 - Tokyo Marine Insurance changes the trade name to Tokyo Marine and Fire Insurance (東京海上火災保険).
March 1919 - Mitsubishi Marine and Fire Insurance (三菱海上火災保険) established.
From Wikipedia’s article on Tokio Marine Nichido, shared under CC BY-SA 4.0.2